Ore-roaster.



No. 869,360. PATENTED OCT. 29. 1907. A. J. GARVER.

ORE ROASTER.

AYPLIUATION FILED JULY 26, 1906.

2 SHEETSSHBET 1 WITNESSES INVENTOH VZCZW g Jl ZZ/Z Z/Zyf Zjji' A TTOHNEYS No. 869,360. PATENTED OCT. 29. 1907. A. J. GARVER.

ORE ROASTER.

APPLICATION FILED JULY 26, 1906.

2 SHEETS-SHEET 2.

I W/TNESSES "n, //VVENT0/? W: c m 057k 1 aarmzz w, WM/n59 ATTORNEYS ALLEN J. GARVER, OF OLARKSTON, \\'.\SlllN(.tl.ON

ASSIGNOR TO lllilltaEliF AND JONATHAN MoASSEY, OF GLA ltKWlON, \YASlllNG'lON.

ORE-ROASTER.

Specification of Letters Patent.

Patented Oct. 29, 1907'.

Application filed July 26, 1906. Serial No. 327,852.

To all whom it may concern:

Be it known that I. Annnx .l. GARVIGH, a citizen of the United States, and a resident of tlarkston. in the county of Asotin and State of Washington. have invented a new and Improved Ore-Roaster. of which the following is a full, clear. and exact description.

My invention relates to roasters of the kind used in treating ores. and more particularly orcs containing sultur. I seek to provide a roaster of simple form. which is self-feeding, self-agit at ing and seli cmptying.

iliy invention further relates to certain details of construction whereby the general etliciency of the roaster is improved.

Reference is to be had to the accompanying drawings forming a part of this specification. in which similar characters of reference indicate corrcsponding parts in all the figures.

Figure 1 is a vertical section through a roaster embodying my invention, taken substantially on the line 1*1 in Fig. 2; Fig. 2 is an end elevation showing the roaster as viewed lroin the left of Fig. 1, the hood 29, chute 28 and certain other parts being removed; and Fig. 3 is a vertical section upon the line 3 I; of Fig. l, looking in the direction of the arrowqand showing the fire-proof cylinder provided with spiral conveyor threads for the purpose of more etlicientjly handling the ore.

An oven l, built of brick or other tire-proof material, is provided with a semi-circular grate 5, upon which the fuel is adapted to rest. Each end of the oven is provided with circular apertures ti, fitted with metallic linings '7. Mounted upon opposite sides of the oven are bosses S secured thereto by means of bolts 5), and provided with bearings 10, 11. Tlearing rollers or wheels 12 are revolubly supported upon these hearings. The bolts 9 are provided with anchorages ]Il, which are lirinly embedded within the walls of the oven at. A cylinder 1.-l, made preferably of cast iron. is provided at one of its ends with a cylinder head 15 having the form of a wheel, and this wheel is provided with a central aperture 16 ot circular form. The wheel is further provided with a manhole 17, secured in position by means of bolts 18 or other suitable t'astenings. An inlet chute shown at 19 is used for the purpose of feeding ore into the cylinder 14 through the aperture 16. Another cylinder head 20 is mounted upon the opposite end of the cylinder 14, and is provided with spaced apertures 21 disposed in the form of a circle, as indie-at ed in Fig. 2. Each aperture 21 is bounded in part by a bevel edge 21, as indicated in Fig. 2. The cylinder .t-zt is lined internally with bricks 22, each having generally the form of a sector and each being provided with a raised thread 23, slightly askew relatively to the general position of the brick. These raised threads are so arranged that when the bricks are placed in position,

the threads of successive bricks virtually constitute a single thread of greater length. l 11 other words the scveral fragmentary threads 23, carried by a series of bricks. are arranged in a definite order. so as to build up threads extending practically throughout thc entire length of the cylinder H. Intermediate of the spiral threads thus formed, are spaces 2-l of general spiral form.

Mountcd upon thc cylindcr l t and conncctcd to thc hcads l and 20 by fastening dcviccs 2 arc bcaring which rcst upon thc bearing rollcrs l2 and The cylindcr rings support thc wcighl of thc cylindcr. hcad I5 is providcd with tccth 26, thus constituting a sprocket \vhccl, which is uscd for rotating thc cylinder.

The orc-bin is shown at 28. A dust chambcr 25) projccts ovcr and partially incloscs onc cud of thc cylindcr ll, and is conncctcd with an acid chamber lit), the lat tcr bcing provided internally with a lcad lining 3|. A fan 232 is mounted upon the acid chamber and is adapted to draw a partial vacuum thcrciu. At. 33 is shown a liquid, which, at thc beginning of thc opcration is clear watcr, but which gradually absorbs thc fumes from thc burning sulfur and thus forms dilutc snll'urous acid, thc strcngth of which, of coursc, gradally incrcascs. A bcnt pipc 34 is used in making the connection from the dust chamber to the acid chambcr. This pipc dips downwardly to a point ncar the bottom of the acid chambcr. Discharge valves are shown at .l S. The valvc 36 is used for drawing off all ol thc sull'uric acid and thc valvc 35 for maintaining the acid at. certain lcvcl, so that thc lower end oi thc pipe 3 1 just dips bclow the surlace of the acid. Normally both valvcs 35, 36 are closed in order to prevcnt the ingress oi air due to suction of the fan 32.

The operation ol' my devicc is as lollows: A lire bcing built upon thc gratc 5 within thc oven f, the cylinder is hcatcd continuously. Ore is fcd through the inlet chutc it) and cntcrs one end of thc cylimlcr, and falls upon the rcl'ractory lirc-proof brick lining. The cylindcr being rotated by mcnns of thc sprockct tccth 2t; in a clockwise direction, as sccu from the right of Fig. thcrc is a tendency .l'or thc ore to be carried along slightly toward the lcft. Since, however, the pitch of the threads 23 is comparativcly slight, thc oro does not move rapidly toward the left but each particle of the ore is slightly lifted until near the top ot the cylindcr and thcn slides down toward thc bottom, only to be carried up again, but this time a little further to the left. .Evcry particle of ore is thus tumbled over and over, and brought into thorough contact with such air or gases as may be within the cylinder. The ore is thus gradually worked toward the left, and is also grad ually hcated as it passes through the cylinder. The ore is finally discharged through the apertures 21 into the ore bin 28, as indicated at the lelt of Fig. 1. During the revolution of the cylinder, the bevel edges 21 and apertures 21 prevent the clogging of the material. That is to say, the rotation 01' the cylinder head 20 causes the bevel edges to form a distinct line 01' demarcation between the material within the cylinder and that Which is passing out. During all this time, the ian 32 being in motion, a partial vacuum is continuously maintained Within the chamber 30, and l'umes oi the burning suli'ur are continuously drawn from the cylin der through. apertures 21 into the hood 29, and thence through the liquid 33 into the chambcr 30, being then discharged by action of the fan. liquid absorbs all the suliurous components of the fumes, and in this manner the manui'acture oi sulturo us acid is carried on continumisly. The ore, completely desulfurized and also deprived oi' all volatile substances and of all gaseous components which may be separated l'rom other components by action of the heat, accumulate-s in the ore bin 28 and may then be Worked up in any desired manner.

The power required lor the rotation of the cylinder 14 is reduced to a minimum, lor the reason that the bearing rollers 12 act alter the manner oi ball bearings but are considerably stronger and more simple in con.- struction.

When desired the manhole 17 may be employed [or obtaining entrance into the cylinder. The arcuate bricks 22 are interchangeable and may be removed one at a time so that the entire inner lining of the cylinder may be renewed either as a \VliOlO or in part.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. The combination oi a cylinder, means for rotatiiig the same, a cylinder head closing one end of said cylinder and provided with apertures and with bevel edges hound- During this step, the

ing said apertures, means for heating said cylinder, and an ore pan disposed adjacent to the path of travel of said apertures.

2. The combination 01 a revoluble cylinder, a cylinder head closing one end thereof, and provided with apertures and with bevel etges bounding said apertures, a dustchainber partially inclosing said cylinder head and said cylinder, means for supplying ore into said cylinder, and an oven lfor heating said cylinder.

:2. The combination of a revoluble cylinder, an oven encircling the same and extending along a considerable por iiion of said cylinder, a plurality of semi-circular grate bars disposed concentric to said cylinder and adapted to heat said ovenfand means for turning said cylinder.

4-. in a. device of the character described, the combination ot" a cylinder provided with an inlet and with an outlet. means [or turning said cylinder, anda tireprool lining tor said cylinder, said tireproo'l lining being built up 01. separate bricks, each brick being provided with a portion having a slight inclination, said portion serving as a coni eyer thread.

The combination of a revoluble cylinder, an oven enci ling the same, grate bars of substantially semi-circular iorm mounted below said cylinder 1d a iproximately concentric thereto, and means for passing ore through said cylinder.

3. The combination of a revoluble cylinder, means for passing ore thcrethrimgh, an oven encircling said cylinder, and f to bars disposed within said oven and having a con i'oi-mity relating to the general shape of said cylinder.

T. The combination or an oven, a revoluble cylinder mounted therein, and a lining for said cylinder, said lining being made ot' separate bricks, each brick having the form ot a sector being provided with a fragmentary thread, the bricks being so arranged that several fragmentary threads are in aiineinent.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

ALLEN J. GARVER.

Witnesses H. .l. Dl-IWAR, C. L. hour. 

